D. Sorting the Coins time limit per test 1 second memory limit per test 512 megabytes input standard input output standard output Recently, Dima met with Sasha in a philatelic store, and since then they are collecting coins together. Their favorite occupation is to sort collections of coins. Sasha likes having things in order, that is why he wants his coins to be arranged in a row in such a way that firstly come coins out of circulation, and then come coins still in circulation.
For arranging coins Dima uses the following algorithm. One step of his algorithm looks like the following:
He looks through all the coins from left to right; If he sees that the i-th coin is still in circulation, and (i + 1)-th coin is already out of circulation, he exchanges these two coins and continues watching coins from (i + 1)-th. Dima repeats the procedure above until it happens that no two coins were exchanged during this procedure. Dima calls hardness of ordering the number of steps required for him according to the algorithm above to sort the sequence, e.g. the number of times he looks through the coins from the very beginning. For example, for the ordered sequence hardness of ordering equals one.
Today Sasha invited Dima and proposed him a game. First he puts n coins in a row, all of them are out of circulation. Then Sasha chooses one of the coins out of circulation and replaces it with a coin in circulation for n times. During this process Sasha constantly asks Dima what is the hardness of ordering of the sequence.
The task is more complicated because Dima should not touch the coins and he should determine hardness of ordering in his mind. Help Dima with this task.
Input The first line contains single integer n (1 ≤ n ≤ 300 000) — number of coins that Sasha puts behind Dima.
Second line contains n distinct integers p1, p2, …, pn (1 ≤ pi ≤ n) — positions that Sasha puts coins in circulation to. At first Sasha replaces coin located at position p1, then coin located at position p2 and so on. Coins are numbered from left to right.
Output Print n + 1 numbers a0, a1, …, an, where a0 is a hardness of ordering at the beginning, a1 is a hardness of ordering after the first replacement and so on.
Examples input 4 1 3 4 2 output 1 2 3 2 1 input 8 6 8 3 4 7 2 1 5 output 1 2 2 3 4 3 4 5 1 Note Let’s denote as O coin out of circulation, and as X — coin is circulation.
At the first sample, initially in row there are coins that are not in circulation, so Dima will look through them from left to right and won’t make any exchanges.
After replacement of the first coin with a coin in circulation, Dima will exchange this coin with next three times and after that he will finally look through the coins and finish the process.
XOOO → OOOX
After replacement of the third coin, Dima’s actions look this way:
XOXO → OXOX → OOXX
After replacement of the fourth coin, Dima’s actions look this way:
XOXX → OXXX
Finally, after replacement of the second coin, row becomes consisting of coins that are in circulation and Dima will look through coins from left to right without any exchanges.
题意：有n个硬币，刚开始所有的硬币均为不流通，然后分开n次使得n个硬币流通，小明每次只能从左到右看，不能返回，且不能用手改变位置，若看的位置是流通硬币且下一个硬币是不流通的，则小明则在心中将这两个硬币交换位置，若前后两个硬币均为流通或不流通则不交换，问每次将此时流通的硬币全部排到最后的难度是多少（因为每次看完要记住当前的位置，所以看的次数越多越难，不用看时的难度为1多看一次加一）。
画一下图就会发现，如xooxoo，第一次交换后是ooxoox，然后是ooooxx，每次最后的硬币不会交换，然后相当于每一次将第一个移到最后的一个o，然后把之前的o都向前移一位，因此每次移一个到后面之后，变成x的那位之前一定是o，因此当前的排序次数就是最后一个o之前的x的个数+1
#include<cstdio> #include<iostream> #include<cstring> #include<algorithm> using namespace std; const int maxn = 1e6+5; int vis[maxn],a; int main() { int n; cin>>n; int num=0,las=n; cout<<1<<endl; for(int i=1;i<=n;i++) { scanf("%d",&a); vis[a]=1; num++; while(vis[las]) num--,las--; printf("%d\n",num+1); } return 0; }